The theoretical and experimental researches of electromagnetic influence from a traction electrosupply system on a railway circuits

The theoretical and experimental researches of electromagnetic influence on a railway lines from a traction electrosupply system were carried out. The mathematical model and computer program on its basis for evaluation of influence of traction current on railway circuits was proposed. Developed method was used for testing of an AC electric locomotive with asynchronous engines on electromagnetic compatibility with rail circuits. In some locomotive operation regimes the harmonious interference in railway circuits with frequencies that coincide with frequencies of signal currents used for interlocking and automatic locomotive signalization were registered.